Consideration of Microstructural Changes in the Study of Adiabatic Shear Bands.

Abstract

We have analyzed the effect of microstructural changes on the initiation and growth of shear bands. These have been studied by developing an adaptive mesh refinement technique to decipher adiabatic shear bands in two-dimensional problems, formulating a three-dimensional finite-deformation theory for dipolar thermoviscoplastic materials and using it to examine the initiation and growth of shear bands in plane strain thermomechanical deformations of dipolar materials, employing an internal variable theory of Brown, Kim and Anand to study the shear band problem, investigating the possibility of phase transformations during the development of adiabatic shear bands in a steel specimen, ascertaining the speed of propagation of a shear band in a steel tube, assessing the effect of frictional forces between the loading device and the cylinder ends, and, analyzing the development of a shear band in a FCC single crystal. Principal results obtained during these investigations are summarized in the report. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1994
Accession Number
ADA290398

Entities

People

  • Romesh C. Batra

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Computational Fluid Dynamics
  • Computational Science
  • Constitutive Equations
  • Crystal Structure
  • Crystals
  • Differential Equations
  • Finite Element Analysis
  • Geometric Forms
  • Materials
  • Mechanical Properties
  • Mechanics
  • Partial Differential Equations
  • Phase Transformations
  • Three Dimensional
  • Two Dimensional

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Systems Analysis and Design